Removed incorrect prefix calulation (error when root contains trailing slash), to prefer input.
Renamed config directive "cache" to "cache_lru"
Documented cache_lru in the config sample
Added LRU cache explanations in the README
Merge pull request #159 from dotcloud/cache-lru

Cache lru
- Added bandwidth_parser script that reads from docker-registry's log file
	- Keep the data in redis for 24hs
- Added config environment for prod/redis
- Refactored the bandwidth_parser
- Removed bandwidth_cache file
- Added the posinstall script to add a crontab job
- Changed the name of the redis instance
Merge pull request #117 from rogaha/bandwidth_measurement

- Added bandwidth_parser script that reads from docker-registry's log file
some cleaning
Added some private config files to ignore list
Merge pull request #146 from theopolis/master

storage_path with local and trailing '/', error when parsing path through list_directory
Make storage path configurable by environment variable